Journal
ULTRASONICS
Volume 53, Issue 7, Pages 1304-1308Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ultras.2013.03.015
Keywords
Omni-directional guided wave; Magnetostrictive patch transducer; Shear-horizontal wave
Funding
- National Research Foundation of Korea (NRF) [2012-0006397]
- Korean Ministry of Education, Science and Technology (MEST) through Institute of Advanced Machinery and Design at Seoul National University
- World Class University (WCU) Program through NRF [R31-2010-000-10083-0]
- MEST
- National Research Foundation of Korea [R31-2010-000-10083-0] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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As an effective tool to inspect large plates, omni-directional guided wave transducers have become more widely used to form phased-array inspection systems. While omni-directional Lamb wave transducers have been successfully utilized in the systems, omni-directional Shear-Horizontal (SH) wave transducers have not been investigated. In this paper, we propose an omni-directional SH magnetostrictive patch transducer that consists of an annular magnetostrictive patch, a toroidal coil and a permanent magnet. After presenting the unique configuration of the proposed transducer and its working principle, the omni-directivity of the developed transducer is verified through simulations and experiments conducted in an aluminum plate. The frequency characteristics of the proposed transducer depending on the patch size are also investigated as the underlying reference data for future construction of an SH phased-array system. (C) 2013 Elsevier B. V. All rights reserved.
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